Updating readme

Signed-off-by: Elliot Condon <e@elliotcondon.com>
Allow Number field to save empty value

Signed-off-by: Elliot Condon <e@elliotcondon.com>
Improved WYSIWYG JS

Signed-off-by: Elliot Condon <e@elliotcondon.com>
Fixed field type label when editing a field group

https://github.com/AdvancedCustomFields/acf5-beta/issues/140
Signed-off-by: Elliot Condon <e@elliotcondon.com>
Added in missing options page functions

https://github.com/AdvancedCustomFields/acf5-beta/issues/138
Signed-off-by: Elliot Condon <e@elliotcondon.com>